Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1988-02-16
1989-01-31
Nussbaum, Marven L.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333818, 333212, 333251, 333228, H01P 1208, H01P 1212, H01P 1162
Patent
active
048022349
ABSTRACT:
A microwave band pass filter for filtering electromagnetic signals has a set of cavities arranged serially, with a block of dielectric material filling each cavity to define regions of each cavity which are loaded with dielectric material and regions which are free of the dielectric material. Each cavity may be viewed as a resonator for a fundamental mode of progagation of an electromagnetic wave while each block can be viewed as a resonator for higher-order modes of propagation of electromagnetic power. The cavities are separated by walls having slots aligned with the free regions of the cavities for coupling power from the fundamental mode while minimizing interaction with power of the higher-order modes. The filter enables the construction of an enlarged passband while inhibiting the presence of the spurious higher-order modes in a stop band bordering the passband.
REFERENCES:
patent: 3237132 (1966-02-01), Okaya
patent: 4184130 (1980-01-01), Nishikawa et al.
patent: 4500859 (1985-02-01), Ren et al.
Hammond Martin B.
Kich Rolf
Tatomir Paul J.
Hughes Aircraft Company
Karambelas A. W.
Meltzer Mark J.
Mitchell Steven M.
Nussbaum Marven L.
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